Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
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One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions verified
“6318” across 5 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKF631890 × 190 × 43 mm | FAG631890 × 190 × 43 mm | TIMKEN631890 × 190 × 43 mm | NSK631890 × 190 × 43 mm | KOYO631890 × 190 × 43 mm |
|---|---|---|---|---|---|
| Comparable specifications | |||||
| Brand | SKF | FAG | TIMKEN | NSK | KOYO |
| Designation | 6318 | 6318 | 6318 | 6318 | 6318 |
| Product family | Deep groove ball bearings | — | Radial Deep-Groove Ball | Single row deep groove ball bearings | Single-row / Open type |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Series | — | — | 6300 | — | — |
| Bore diameterd | 90 mm | 90 mm | 90 mm | 90 mm | 90 mm |
| Outside diameterD | 190 mm | 190 mm | 190 mm | 190 mm | 190 mm |
| WidthB | 43 mm | 43 mm | 43 mm | 43 mm | 43 mm |
| Basic dynamic load ratingC | 151 kN | 142 kN | 143 kN | 157 kN | 178 kN |
| Basic static load ratingC0 | 108 kN | 102 kN | 107 kN | 107 kN | 107 kN |
| Fatigue load limitPu | 3.8 kN | 5.9 kN | — | — | 8.8 kN |
| Reference speednref | 7500 r/min | 5100 r/min | — | — | — |
| Limiting speednG | 4800 r/min | 4900 r/min | — | — | 3500 r/min |
| Mass≈m | 4.9 kg | 5.164 kg | 4.91 kg | 4.98 kg | 4.91 kg |
| Precision class | P6 and tighter width tolerance | PN — Normal (ISO 492:2023) | — | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — | — |
| Sealing | Without | Without — Not sealed | Open | Open | Open |
| Cage | Sheet metal | JN — Steel sheet metal | Steel cage | — | — |
| Bearing material | Bearing steel | — | — | — | — |
| Lubricant | None | Without — Bearing not greased | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — | — |
| Maximum operating temperatureTmax | — | 150 °C | — | — | — |
| Boundary dimensions | |||||
| Bearing widthB | — | — | — | 43 mm | — |
| Minimum bearing chamferr min. | — | — | — | 3 mm | — |
| Calculation Factors | |||||
| K Factor | — | — | 0.00 | — | — |
| Y1 Factor | — | — | 0.00 | — | — |
| Y2 Factor | — | — | 0.00 | — | — |
| Y0 Factor | — | — | 0.50 | — | — |
| E Factor | — | — | 0.00 | — | — |
| Cg Factor | — | — | 0.0641 | — | — |
| Calculation factors | |||||
| Calculation factorf0 | — | 13.9 | — | — | — |
| Capabilities & suitability | |||||
| Radial load capacity | — | Yes | — | — | — |
| Axial load capacity in one direction | — | Yes | — | — | — |
| Axial load capacity in both directions | — | Yes | — | — | — |
| Suitable for grease lubrication | — | Yes | — | — | — |
| Suitable for oil lubrication | — | Yes | — | — | — |
| Unsealed design | — | Yes | — | — | — |
| Classification | |||||
| Official Category Path | — | — | — | — | Deep groove ball bearings - Single-row - Open type |
| Official Classification 1 | — | — | — | — | Deep groove ball bearings / Single-row / Open type |
| Construction | |||||
| Catalogue closure construction | — | — | — | Open | — |
| Dimensions | |||||
| Minimum chamfer dimensionrmin | — | 3 mm | — | — | — |
| Minimum chamfer dimensionrmin | — | 0.118 in | — | — | — |
| Shoulder diameter outer ringD1 | — | 157.18 mm | — | — | — |
| Shoulder diameter outer ringD1 | — | 6.188 in | — | — | — |
| Shoulder diameter inner ringd1 | — | 123.66 mm | — | — | — |
| Shoulder diameter inner ringd1 | — | 4.869 in | — | — | — |
| Engineering — Abutment dimensions | |||||
| Diameter of shaft abutmentd a | min. 104 mm | — | — | — | — |
| Diameter of housing abutmentD a | max. 176 mm | — | — | — | — |
| Radius of shaft or housing filletr a | max. 2.5 mm | — | — | — | — |
| Engineering — Calculation data | |||||
| SKF performance class | SKF Explorer | — | — | — | — |
| Minimum load factork r | 0.03 | — | — | — | — |
| Calculation factorf 0 | 13.3 | — | — | — | — |
| Engineering — Dimensions | |||||
| Deviation limits of mid-range bore diametert Δdmp | -0.015 to 0 mm | — | — | — | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.02 to 0 mm | — | — | — | — |
| Deviation limits of ring widtht ΔBs | -0.1 to 0 mm | — | — | — | — |
| Shoulder diameterd 1 | ≈ 121.15 mm | — | — | — | — |
| Recess diameterD 2 | ≈ 163.9 mm | — | — | — | — |
| Chamfer dimensionr 1,2 | min. 3 mm | — | — | — | — |
| ISO tolerance class for dimensions | P6 and tighter width tolerance | — | — | — | — |
| Engineering — Tolerances of run-out | |||||
| Range of section height at inner ring of assembled bearingt Kia | 25 µm | — | — | — | — |
| Range of section height at outer ring of assembled bearingt Kea | 50 µm | — | — | — | — |
| ISO tolerance class for geometrical tolerances | Normal | — | — | — | — |
| Load ratings | |||||
| Basic dynamic radial load ratingCr | — | — | — | 157000 N | — |
| Basic static radial load ratingC0r | — | — | — | 107000 N | — |
| Equivalent-load calculation factorf0 | — | — | — | 13.3 | — |
| Logistics | |||||
| Product net weight | 4.9 kg | — | — | — | — |
| eClass code | 23-05-08-01 | — | — | — | — |
| UNSPSC code | 31171504 | — | — | — | — |
| Lubrication-qualified speed | |||||
| Limiting speed with grease | — | — | — | 4000 r/min | — |
| Limiting speed with oil (open bearing) | — | — | — | 4800 r/min | — |
| Main Dimensions & Performance Data | |||||
| Basic dynamic load rating, radialCr | — | 142,000 N | — | — | — |
| Basic dynamic load rating, radialCr | — | 31,924.46 lbf | — | — | — |
| Basic static load rating, radialC0r | — | 102,000 N | — | — | — |
| Basic static load rating, radialC0r | — | 22,931.655 lbf | — | — | — |
| Fatigue load limit, radialCur | — | 5,900 N | — | — | — |
| Fatigue load limit, radialCur | — | 1,326.439 lbf | — | — | — |
| Manufacturer Identity | |||||
| Schaeffler Product Code | — | 351846 | — | — | — |
| Material Number | — | — | 000000000190014095 | — | — |
| Official Class Key | — | — | — | — | 010-010-010 |
| Base Type | — | 6318 | — | — | — |
| World Assembly Part Number | — | — | 6318 | — | — |
| Gpsd Group | — | S02 | — | — | — |
| Upc | — | — | 0087796302129 | — | — |
| Product Line Id | — | 14 | — | — | — |
| X Life Marking | — | n.r. | — | — | — |
| Official Source System | — | — | CORE BP - DS DF | — | — |
| Official Last Run | — | — | 2026-08-23T20:02:47.947 | — | — |
| SAP material number | — | 0167242910000 | — | — | — |
| Base product | — | 2305080101 | — | — | — |
| Bearing X designation | — | 6318 | — | — | — |
| Mounting Manager ID | — | 6318 | — | — | — |
| Grease application ID | — | 6318 | — | — | — |
| Mounting dimensions | |||||
| Minimum shaft shoulder diameterda min. | — | — | — | 103 mm | — |
| Maximum shaft shoulder diameterda max. | — | — | — | 117 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | — | 177 mm | — |
| Maximum shaft or housing fillet radiusra max. | — | — | — | 2.5 mm | — |
| Minimum diameter shaft shoulderda min | — | 104 mm | — | — | — |
| Minimum diameter shaft shoulderda min | — | 4.094 in | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 176 mm | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 6.929 in | — | — | — |
| Maximum fillet radiusra max | — | 2.5 mm | — | — | — |
| Maximum fillet radiusra max | — | 0.098 in | — | — | — |
| Product characteristics | |||||
| Type of SealWithout | — | Not sealed | — | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — | — |
| Dimensional / heat stabilizationS0 | — | Rings dimensional stabilized up to 150° | — | — | — |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance | — | — | — |
| Bore typeZ | — | Cylindrical | — | — | — |
| Product identity | |||||
| Official product category | Deep groove ball bearings | — | — | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/deep-groove-ball-bearings | — | — | — | — |
| Structure group ID | BB1_001_101 | — | — | — | — |
| Available from SKF | Yes | — | — | — | — |
| Remanufacturable | No | — | — | — | — |
| Product Identity | |||||
| Type Description | — | — | Radial Deep-Groove Ball | — | — |
| Construction | — | Deep groove ball bearing 63, single row, steel sheet metal cage | Single Row Deep Groove Ball Bearing | Imperial Series | 3.5433 in Bore | 7.4803 in OD | 1.6929 in Width | Open | Cylindrical Bore | Steel Cage | C0 Clearance | ISO P0 Tolerance | — | — |
| Number Of Rows | 1 | — | 1 | — | — |
| Short Description | — | Deep groove ball bearing | — | — | — |
| Tapered Bore | — | — | N | — | — |
| Properties | |||||
| Filling slots | Without | — | — | — | — |
| Locating feature, bearing outer ring | Without | — | — | — | — |
| Bore type | Cylindrical | — | — | — | — |
| Matched arrangement | No | — | — | — | — |
| Radial internal clearance | CN | — | — | — | — |
| Material, bearing | Bearing steel | — | — | — | — |
| Coating | Without | — | — | — | — |
| Relubrication feature | Without | — | — | — | — |
| Indicative carbon footprint for new product | 18.1 kg CO 2 e | — | — | — | — |
| Reference mass | |||||
| Approximate catalogue mass (open reference) | — | — | — | 4.98 kg | — |
| Technical Data | |||||
| d | — | — | — | — | 190 mm |
| Overall Width | — | — | 0.000 mm | — | — |
| B | — | — | — | — | 43 mm |
| Radial Rating | — | — | 0 N | — | — |
| R(Min.) | — | — | — | — | 3 mm |
| Bore Diameter (D) | — | 90 mm | — | — | — |
| Axial Rating | — | — | 0 N | — | — |
| Basic Load Ratings : Cr | — | — | — | — | 178 kN |
| Outside Diameter (D) | — | 190 mm | — | — | — |
| Dynamic Rating C1 | — | — | 143,000 N | — | — |
| Basic Load Ratings : C0R | — | — | — | — | 107 kN |
| Width (B) | — | 43 mm | — | — | — |
| Dynamic Rating C90 | — | — | 0 N | — | — |
| Fatigue Load Limit : Cu | — | — | — | — | 8.80 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 142,000 N | — | — | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N | — | — |
| Factor : F0 | — | — | — | — | 13.3 |
| Basic Static Load Rating, Radial (C0R) | — | 102,000 N | — | — | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | — | 3500 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — | — |
| Static Radial Rating C0 | — | — | 107,000 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | — | 4200 min-1 |
| Limiting Speed (Ng) | — | 4,900 1/min | — | — | — |
| Extended Dynamic Rating Ce | — | — | 0 N | — | — |
| Da(Min.) | — | — | — | — | 103 mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — | — |
| Static Axial Rating C0A | — | — | 0 N | — | — |
| Da(Max.) | — | — | — | — | 177 mm |
| Reference Speed (Nϑr) | — | 5,100 1/min | — | — | — |
| Ra(Max.) | — | — | — | — | 2.5 mm |
| Calculation Factor (F0) | — | 13.9 | — | — | — |
| Mass(Refer.) | — | — | — | — | 4.91 kg |
| Fatigue Load Limit, Radial (Cur) | — | 5,900 N | — | — | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 104 mm | — | — | — |
| Shoulder Diameter Inner Ring (D1) | — | 123.66 mm | — | — | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 176 mm | — | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 3 mm | — | — | — |
| Maximum Fillet Radius (Ra Max) | — | 2.5 mm | — | — | — |
| Shoulder Diameter Outer Ring (D1) | — | 157.18 mm | — | — | — |
| Temperature range | |||||
| Operating temperature min.Tmin | — | -30 °C | — | — | — |
| Operating temperature min.Tmin | — | -22 °F | — | — | — |
| Operating temperature max.Tmax | — | 150 °C | — | — | — |
| Operating temperature max.Tmax | — | 302 °F | — | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.